So a guy walks into a bar. He meets a woman. They talk, drink, flirt, drink some more and leave together. When he wakes in the morning, she's gone. No sweet note on the pillow, no phone number on the fridge. He chuckles to himself, shrugs his shoulders, and flips on the telly. An hour later he checks his phone: still nothing. He's a little flattered at being the victim of equal-opportunity objectification, but he's also starting to feel a little used. He feels like, well, like a girl.

It's not breaking news that women are engaging in one-night stands. What's changed is that they aren't necessarily expecting the sex to lead to something else. They may choose to have sex not because they want you to like them, but because they don't care if you do. If a woman is so inclined, she has it easier when it comes to lovin' and leavin': latchkey ladies don't often have to face the dreaded, "When will I see you again?" - because the guy is busy planning his own exit.

Part of the appeal of casual sex for women is that the hint of anonymity lets them be whoever they want in bed. If she doesn't care about making him fall in love with her, she's free to focus on the act itself, without messy emotions getting in the way. It's the hassle-free fulfilment of basic sexual needs (yep, women have them, too). Raised to be a giver, she can finally take. She can be a selfish lay. She can be like, well, like a guy.

Of course, everyone should learn how to be a sensitive giver within any relationship. But in the meantime, we'll settle for a little table-turning. So men, next time you're tiptoeing out of a woman's bedroom, try turning around: she might just give you a cheerful wave goodbye.